Add new acceptance test scenario 027

```
  Error:
    × Main thread panicked.
    ├─▶ at /Users/ktorz/Documents/Projects/aiken-lang/aiken/crates/project/src/lib.rs:640:36
    ╰─▶ called `Result::unwrap()` on an `Err` value: FreeUnique(Name { text: "test_foo", unique:
        Unique(0) })
  ```

examples/acceptance_tests/027/lib/test.ak

@@ -0,0 +1,11 @@
+pub fn foo(_a : a) -> Bool {
+  True
+}
+
+test test_1() {
+  foo(1)
+}
+
+test test_2() {
+  foo(1) && foo(2)
+}